java.io.NotSerializableException：com.wings.marketingevent.util.FlowWizard

Question

我認爲這很簡單，但我陷入了這個困境。這個想法是想使用liferay wizard，如：https://www.primefaces.org/showcase/ui/panel/wizard.xhtml。我有這樣的XHTML：

<h:form id="frmCreate"> 
    <p:wizard flowListener="#{flowWizard.onFlowProcess}"> 
     <p:tab id="header" title="Header"> 
      <p:panel> 
       /*1*/ 
      </p:panel> 
     </p:tab> 

     <p:tab id="detail" title="Detail"> 
      <p:panel> 
       /*2*/ 
      </p:panel> 
     </p:tab> 

     <p:tab id="confirmation" title="Confirmation"> 
      <p:panel> 
       /*3*/ 
      </p:panel> 
     </p:tab> 
    </p:wizard> 
</h:form> 

而且對bean：

@ManagedBean 
@ViewScoped 
public class FlowWizard { 
    public String onFlowProcess(FlowEvent event) { 
     return event.getNewStep(); 
    } 
} 

但是，當我試圖點擊NEXT按鈕，它不會在頁面切換到下一個標籤，和我控制檯上出現以下錯誤消息：

11:16:21,663 ERROR [ExceptionHandlerAjaxImpl:62] java.io.NotSerializableException: com.wings.marketingevent.util.FlowWizard 
javax.faces.FacesException: java.io.NotSerializableException: com.wings.marketingevent.util.FlowWizard 
    at com.sun.faces.renderkit.ResponseStateManagerImpl.getViewState(ResponseStateManagerImpl.java:137) 
    ... 
Caused by: java.io.NotSerializableException: com.wings.marketingevent.util.FlowWizard 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156) 
    ... 
Jul 13, 2013 11:16:21 AM org.apache.catalina.core.ApplicationDispatcher invoke 

怎麼回事？謝謝。

Answer 1

堆棧跟蹤表明，你需要在FlowWizard